How to make screen bigger in byobu

This means that there is another ssh or terminal client, other than yourself, connected to this session, which has a smaller window size than yours.

You can detach all clients but yourself, using this Byobu hotkey:

Alt-F6

Or you can run the script /usr/lib/byobu/include/tmux-detach-all-but-current-client

Full disclosure: I am the author and maintainer of Byobu.

An alternative to Alt-F6 is Prefix-Shift-D, where Prefix is your byobu escape command (typically Ctrl-a).

See more info here: https://stackoverflow.com/questions/22138211/how-do-i-disconnect-all-other-users-in-tmux.

Alt-F6 did not work for me. But I found that I was using tmux. To detach the other window use a combination of list-clients and detach-client:

% tmux list-clients
/dev/pts/1: 0 [64x160 xterm] (utf8)
/dev/pts/39: 0 [39x143 xterm] (utf8)
% tmux detach-client -t /dev/pts/39

Since the 64x160 is larger, I figured that was my window while the other client was the smaller one.